LED bulb



FIG. 1 is an upper perspective view of an LED bulb;

FIG. 2 is a top view thereof;

FIG. 3 is a rear and front view thereof;

FIG. 4 is a left side and right side view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines shown in FIG. 5 form no part of the claimed design. 

CLAIM The ornamental design for an LED bulb, as shown. 